A fiber-optic localized surface plasmon resonance (LSPR) sensor anchored with metal organic framework (HKUST-1) film for acetone sensing
A fiber-optic localized surface plasmon resonance (LSPR) sensor anchored with metal organic framework (HKUST-1) film for acetone sensing
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DOI：
10.1117/12.2539413
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Liangliang Liu;Chenyang He;S. Morgan;R. Correia;S. Korposh
中科院分区：
文献类型：
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作者：
Liangliang Liu;Chenyang He;S. Morgan;R. Correia;S. Korposh
报道了一种用于丙酮传感的光纤局域表面等离子体共振（LSPR）传感器。它的设计是通过化学吸附过程在多模光纤的尖端涂覆金纳米粒子（尺寸：~ 40 nm），并通过逐层工艺将其与金属有机框架（MOF） HKUST-1进一步功能化。报道了两种不同层数（80层和120层）对应不同厚度的传感器。由于丙酮吸附在HKUST-1薄膜上，导致局部折射率增加，两个传感器都显示共振波长向丙酮红移。随着丙酮浓度的增加，传感器逐渐饱和，当浓度降低时，传感器完全可逆。当丙酮浓度为3.4%时，较厚薄膜的传感器对丙酮的灵敏度略高于较薄薄膜（波长位移为5.27 nm）。
A tip-based fiber-optic localized surface plasmon resonance (LSPR) sensor is reported for sensing of acetone. It is designed by coating the tip of multi-mode optical fiber with gold nanoparticles (size: ~ 40 nm) via a chemisorption process and further functionalization with a metal-organic framework (MOF) HKUST-1 via a layer-by-layer process. Two sensors with a different number of layers (80 and 120) corresponding to different thicknesses are reported. Both sensors show a redshift of resonance wavelength to acetone as a result of an increase in local refractive index induced by acetone adsorption into the HKUST-1 thin film. Sensors gradually saturate as acetone concentration increases and are fully reversible when the concentration decreases. The sensor with a thicker film exhibits slightly higher sensitivity to acetone than the thinner film with a wavelength shift of 5.27 nm for the concentration of 3.4 %.